Leaf for loose-leaf ledgers.



PATENTED DEC. 25, 1906.

C. E. BROADWELL. LEAP FOR LOOSE LEAP LEDGERS.

APPLICATION FILED MAE. 1. 1906.

PE S S (8 S Q w D X54? f Jay 447v.

UNITE 2| CHARLES E.

STATES PATENT OFFICE.

LEAF FOR LOOSE-LEAF LEDGERS.

Specification of Letters Patent.

Patented Dec. 1906- Applitation filed March 1, 1906. Serial No. 303.610.

To a whom it may concern:

Be it known that I, CHARLES E.- BROAD- WELL, a-citizen of the United States, residing in the city and county of San Francisco, State of California, have invented certain new and useful Improvements in Leaves for Loose-Leaf Ledgers; and I hereby declare the following to be a full, clear, and exact description of the same.

The present invention relates to an improved leaf for use in connection with what is known as loose-leaf lodgers, temporary binders, and transfenbinders, the object of the invention being to so construct the leaves that the surface of one leaf will interlock, so to speak, with the surface of its opposing leaf, thereby preventing the leaves crawling, cr eping, or slipping outward durifigdthe opening of the book while being hane Books of the loose-leaf type are generally of large size and of considerable weight, containing five hundred or more pages. The stub of each leaf is formed with spaced slotted perforations, which perforations enable the leaves to be fitted over the fixed filingposts of the book, which posts are designed to hold the leavesin adjusted position. However, practical use of such books has demonstrated the fact that when the heavy books are opened the stubs, due to the weight of the leaves and binding of the book acting as a lever, tend to and as a matter of fact do cause the leaves to crawl or creep outward, the leaves being thus forced away from the filing-posts of the book. It is this defect which the present invention is designed to overcome.

To comprehend the invention, reference should be had to the accompanying sheet of drawings, wherein Figure 1 is a transverse sectional view of an ordinary loose-leaf binder, said view disclosing the arrangement of the leaves therein. Fig. 2 is a broken plan view of one of the leaves. Fi 3 is a transverse section taken on line it nFig. 2 of the drawings; and Fi 4 is a longitudinal section disclosing a mo iiication of the leaf set forth in Fig. 2 of the drawings.

Referring to Fig. 1 of the drawings, the numerals 1 and 2 designate the front and back cover, respectively, 'of an ordinary book of the loose-leaf type, and 3 the spaced filingposts, which usually are ri id with the back cover 2 of the book. The s eets 4 are formed with the usual spaced perforations 5, which enable the sheets being fitted upon the filingposts 3, said perforations being formed in the stub 6 of the sheets 4. Each stub is slotted longitudinally, as shown at 7-, which slots intercept the perforations of the sheets. It is by reason of the stubs being thus slotted that any given sheet may be withdrawn or removed from Within the book.

The fore oing is the usual construction of leaves use in connection with books of the loose-leaf type.

i .To prevent the crawling or creeping of the leaves during the handling of the books, the leaves to be used are so formed that the surface of one leaf will interlock with the surface of an adjacent leaf, so that all the leaves after being fitted upon the filing-posts and held between the covers of the book will be held locked independent of the frictional hold of the leaf to the filing-posts of the book. A simple, effective, and inexpensive means of so interlocking the sheets or leaves is to emboss the stub-section 6 of each sheet 4 so as to form one or more raised projections 8 on the upper surface thereof, whereby the under surface of each stub is provided with one or more depressions 9, so that when the sheets or le aves are fitted within the book the raised projections of one stub will register with and fit into the depressions of the sheet immedibeing thus interlocked one with the other.

Preferably the projections 8 are formed intermediate the perforations 5 of the stub 6; but this is an immaterial feature. The simplest manner of forming the projections 8 is by embossing the stubs of each sheet, the depressions 9 being thus formed as the under surface of the projections 8. In so embossing the stub of-the sheet or leaf the said stub preferably should be slightly dampened. The shape of the projection 8 may be varied as desired, the only requirement being that a resisting-surface against slippage of one leaf from the other be provided when the sheets or leaves are interlocked.

ately above, the sheets or leaves of the book It is obvious that the interlocking of the sheets may be accomplished other than by the formation of projections on one face of the stub of the leaf and depressions on the opposite face, for, as disclosed by Fig. 4 of the drawings, the stub of each leaf may be corrugated. or fluted transversely. In such case the upper surface of the stub presents a series of transverse ridges 10 and the under surfacea series of transverse depressions or grooves 11 the ridges of one surface of the stub interlocking with the grooves or depressions onthesurface of the adjacent stub of the leafimmediately thereabove.

While only dep essions and projections,

' and transverse ridges and grooves have been illustrated asthe' engaging means for holding' the stub of one leaf locked to the opposing stub of an adjacent sheet, it is obvious j that any en aging surface for the leaf-stub is claimed as new, and desired'to be protected by Letters Patent, is

.1. A leaf for loose-leaf books, the stub por. tion thereof having its surfaces formed to-interlock with the stub-surfaces of adjacent leaves ofa book.

2. A leaf for loose-leaf books, the stub portion thereof being formed with projections on one face and depressions'on the opposing face, so that the leaf will interlock with the Surfaces of adjacent leaves-of a book.

3. A leaf for loose-leaf books, the surfaces thereof provided at the binding edge thereof with engaging means for interlocking with the surfaces of adjacent leaves of a book, the

-other portion of the surface of the leaf being Y free and unobstructed.

4. A loose-leaf book provided with a series of leaves, the surfaces of each leaf interlocking with the surface of adjacent leaves of the book at points in alinement with and intermediate the binding-points of the leaves.

5. A le'a-f for loose-leaf books, the same being provided with a stub-section, the sur faces of said section being formed'to interlock with the surface .of stub-section of'adjacent leaves of. a book. g

6. A leaf for loose-leaf books including a stub portion or binding edge, openings therein for engagement with filing posts, and

means intermediate said openings and inte- I gral with the leaf for causing interlocking interlock with corresponding de ressions and raised portionsin the adjacent eaf.

In testimony whereof I have hereunto affixed my signature in the presence of wit nesses.

CHARLES EIBROADWELL. Witnesses:

N. A. AoKER, D. B. RICHARDS.

thga'dja- 

